LeetCode 1791: Find Center of Star Graph Solution
Master LeetCode problem 1791 (Find Center of Star Graph), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
1791. Find Center of Star Graph
Problem Explanation
Explanation:
To find the center of the star graph, we can observe that the center node will always be connected to every other node in the graph. Therefore, the node that appears in all the edges will be the center of the star graph. We can count the occurrences of each node in the given edges and return the node that appears n-1 times. :
Solution Code
class Solution {
public int findCenter(int[][] edges) {
int n = edges.length + 1;
int[] count = new int[n + 1];
for (int i = 0; i < edges.length; i++) {
count[edges[i][0]]++;
count[edges[i][1]]++;
}
for (int i = 1; i <= n; i++) {
if (count[i] == n - 1) {
return i;
}
}
return -1;
}
}Try It Yourself
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